//
//  WBMainNavigationController.swift
//  weibo
//
//  Created by z先生 on 17/1/5.
//  Copyright © 2017年 SZT. All rights reserved.
//

import UIKit

class WBMainNavigationController: UINavigationController {

    
    
    
    
    
    override func viewDidLoad() {
        
        super.viewDidLoad()
        
       navigationBar.isHidden = true
        
        
    }
    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        
        if childViewControllers.count > 0{
            
            viewController.hidesBottomBarWhenPushed = true
            
            if let vc = viewController as? WBBaseViewController {
                
                var title = "返回"
               
                if childViewControllers.count == 1 {
                    
                    title = childViewControllers.first?.title ?? "返回"
                    
                }
                vc.navItem.leftBarButtonItem = UIBarButtonItem(title: title, target: self, action: #selector(popToParent), isBackButton:true)
        }
        
        
            
        }
        
        super.pushViewController(viewController, animated: true)
    }
    
    @objc private func popToParent(){
        
        popViewController(animated: true)
    }
}
